Comment # 6 on bug 948134 from Martin Vidner

Thanks for the report. This change is in fact intentional. See rpm -qa
libyui-qt-pkg\* --changelog

- Unified option handling with NCurses (FATE#318099)
  - "System verification mode" and "Dependencies/Autocheck"
    moved to /etc/sysconfig/yast2 (PKGMGR_VERIFY_SYSTEM,
    PKGMGR_AUTO_CHECK).
  - made "Cleanup when deleting packages" and "Allow vendor
    change" not persistent.
- Added option Dependencies/Install Recommended Packages,
  (PKGMGR_RECOMMENDED) (boo#900853).
- Changed "Options/Ignore Recommended Packages for Already
  Installed Packages" from an option to a command
  "Extras/Install All Matching Recommended Packages" (boo#902394).
- 2.45.0

The rationale for this was:
"""
The /etc/sysconfig/yast2 PKGMGR options intentionally don't include the
'AllowVendorChange' and the 'CleanupWhenDeletingPackages' flag.

These options currently are stored as well in
.config/YaST2/YQPackageSelector.conf. But these options should only be set for
a single solver run/for one install session because if used unintentionally
they can damage the system.
"""